Should I replace all 4 tires at the same time on an AWD SUV
I've put an offer on a 2011 Hyundai Santa Fe with AWD and I'm concerned that they put new all season tires on the front and left older all season tires on the back. The back tires look good from the outside, and the tread depth measures 6mm in the middle, but on the inside they are worn down to just under 3 mm. Of course the dealership is stalling that the back tires meet standards, but I wonder how I'll be able to rotate the existing tires to meet the conditions of the warranty. Also, my 4 wheel drive truck requires all the tires to be changed at the same time, so I'm thinking it should be the same on an AWD. What problems could I encounter with new tires on the front & older on the back?